Add legend click interaction attrs

src/components/legend/attributes.js

@@ -90,6 +90,33 @@ module.exports = {
         ].join(' ')
     },
 
+    itemclick: {
+        valType: 'enumerated',
+        values: ['toggle', 'focus', false],
+        dflt: 'toggle',
+        role: 'info',
+        editType: 'legend',
+        description: [
+            'Determines the behavior on legend item click.',
+            '*toggle* toggles the visibility of the item clicked on the graph.',
+            '*focus* makes the clicked item the sole visible item on the graph.',
+            '*false* disable legend item click interactions.'
+        ].join(' ')
+    },
+    itemdoubleclick: {
+        valType: 'enumerated',
+        values: ['toggle', 'focus', false],
+        dflt: 'focus',
+        role: 'info',
+        editType: 'legend',
+        description: [
+            'Determines the behavior on legend item double-click.',
+            '*toggle* toggles the visibility of the item clicked on the graph.',
+            '*focus* makes the clicked item the sole visible item on the graph.',
+            '*false* disable legend item double-click interactions.'
+        ].join(' ')
+    },
+
     x: {
         valType: 'number',
         min: -2,

src/components/legend/defaults.js

@@ -104,6 +104,9 @@ module.exports = function legendDefaults(layoutIn, layoutOut, fullData) {
 
     coerce('itemsizing');
 
+    coerce('itemclick');
+    coerce('itemdoubleclick');
+
     coerce('x', defaultX);
     coerce('xanchor', defaultXAnchor);
     coerce('y', defaultY);

src/components/legend/handle_click.js

@@ -14,10 +14,29 @@ var Registry = require('../../registry');
 var SHOWISOLATETIP = true;
 
 module.exports = function handleClick(g, gd, numClicks) {
+    var fullLayout = gd._fullLayout;
+
     if(gd._dragged || gd._editing) return;
 
-    var hiddenSlices = gd._fullLayout.hiddenlabels ?
-        gd._fullLayout.hiddenlabels.slice() :
+    var itemClick = fullLayout.legend.itemclick;
+    var itemDoubleClick = fullLayout.legend.itemdoubleclick;
+
+    if(numClicks === 1 && itemClick === 'toggle' && itemDoubleClick === 'focus' &&
+        SHOWISOLATETIP && gd.data && gd._context.showTips
+    ) {
+        Lib.notifier(Lib._(gd, 'Double-click on legend to isolate one trace'), 'long');
+        SHOWISOLATETIP = false;
+    } else {
+        SHOWISOLATETIP = false;
+    }
+
+    var mode;
+    if(numClicks === 1) mode = itemClick;
+    else if(numClicks === 2) mode = itemDoubleClick;
+    if(!mode) return;
+
+    var hiddenSlices = fullLayout.hiddenlabels ?
+        fullLayout.hiddenlabels.slice() :
         [];
 
     var legendItem = g.data()[0][0];
@@ -85,21 +104,14 @@ module.exports = function handleClick(g, gd, numClicks) {
         }
     }
 
-    if(numClicks === 1 && SHOWISOLATETIP && gd.data && gd._context.showTips) {
-        Lib.notifier(Lib._(gd, 'Double-click on legend to isolate one trace'), 'long');
-        SHOWISOLATETIP = false;
-    } else {
-        SHOWISOLATETIP = false;
-    }
-
     if(Registry.traceIs(fullTrace, 'pie')) {
         var thisLabel = legendItem.label;
         var thisLabelIndex = hiddenSlices.indexOf(thisLabel);
 
-        if(numClicks === 1) {
+        if(mode === 'toggle') {
             if(thisLabelIndex === -1) hiddenSlices.push(thisLabel);
             else hiddenSlices.splice(thisLabelIndex, 1);
-        } else if(numClicks === 2) {
+        } else if(mode === 'focus') {
             hiddenSlices = [];
             gd.calcdata[0].forEach(function(d) {
                 if(thisLabel !== d.label) {
@@ -126,7 +138,7 @@ module.exports = function handleClick(g, gd, numClicks) {
             }
         }
 
-        if(numClicks === 1) {
+        if(mode === 'toggle') {
             var nextVisibility;
 
             switch(fullTrace.visible) {
@@ -150,7 +162,7 @@ module.exports = function handleClick(g, gd, numClicks) {
             } else {
                 setVisibility(fullTrace, nextVisibility);
             }
-        } else if(numClicks === 2) {
+        } else if(mode === 'focus') {
             // Compute the clicked index. expandedIndex does what we want for expanded traces
             // but also culls hidden traces. That means we have some work to do.
             var isClicked, isInGroup, otherState;

test/jasmine/tests/legend_test.js

@@ -1067,7 +1067,6 @@ describe('legend interaction', function() {
         });
     });
 
-
     describe('editable mode interactions', function() {
         var gd;
 
@@ -1667,6 +1666,70 @@ describe('legend interaction', function() {
                 .then(done);
             });
         });
+
+        describe('should honor *itemclick* and *itemdoubleclick* settings', function() {
+            var _assert;
+
+            function run() {
+                return Promise.resolve()
+                    .then(click(0, 1)).then(_assert(['legendonly', true, true]))
+                    .then(click(0, 1)).then(_assert([true, true, true]))
+                    .then(click(0, 2)).then(_assert([true, 'legendonly', 'legendonly']))
+                    .then(click(0, 2)).then(_assert([true, true, true]))
+                    .then(function() {
+                        return Plotly.relayout(gd, {
+                            'legend.itemclick': false,
+                            'legend.itemdoubleclick': false
+                        });
+                    })
+                    .then(click(0, 1)).then(_assert([true, true, true]))
+                    .then(click(0, 2)).then(_assert([true, true, true]))
+                    .then(function() {
+                        return Plotly.relayout(gd, {
+                            'legend.itemclick': 'focus',
+                            'legend.itemdoubleclick': 'toggle'
+                        });
+                    })
+                    .then(click(0, 1)).then(_assert([true, 'legendonly', 'legendonly']))
+                    .then(click(0, 1)).then(_assert([true, true, true]))
+                    .then(click(0, 2)).then(_assert(['legendonly', true, true]))
+                    .then(click(0, 2)).then(_assert([true, true, true]));
+            }
+
+            it('- regular trace case', function(done) {
+                _assert = assertVisible;
+
+                Plotly.plot(gd, [
+                    { y: [1, 2, 1] },
+                    { y: [2, 1, 2] },
+                    { y: [3, 5, 0] }
+                ])
+                .then(run)
+                .catch(failTest)
+                .then(done);
+            });
+
+            it('- pie case', function(done) {
+                _assert = function(_exp) {
+                    return function() {
+                        var exp = [];
+                        if(_exp[0] === 'legendonly') exp.push('C');
+                        if(_exp[1] === 'legendonly') exp.push('B');
+                        if(_exp[2] === 'legendonly') exp.push('A');
+                        expect(gd._fullLayout.hiddenlabels || []).toEqual(exp);
+                    };
+                };
+
+                Plotly.plot(gd, [{
+                    type: 'pie',
+                    labels: ['A', 'B', 'C'],
+                    values: [1, 2, 3]
+                }])
+                .then(run)
+                .catch(failTest)
+                .then(done);
+            });
+        });
     });
 });